Method 2:use nvcap maker 1.4 to get the nvcap of my graphics card from the rom file,and use the OSX86 tools to generate the EFI-String,then add it to Chameleon.------get the right information about the graphics card in system report,but the resolution can not be changed, QE-CI didn't work,check the system report and I found NVDANV50Hal.kext NVResman.kext were not loaded

Method 6: I've got a IOPCIFamily.kext from another forum, put this kext in /Extra/Extensions helps with the "PCI Configuration Begin" problem.So I put it in /Extra/Extensions,then put the old dsdt.aml in /Extra.----the information about the graphics card was ok,the pci-slot information was also detected(in method 2 and 5,the pci---slot infromation was not displayed),but but the resolution can not be changed, QE-CI didn't work,check the system report and I found NVDANV50Hal.kext NVResman.kext were not loaded.So after this I add hardware ID into NVDANV50Hal.kext info.plist again,unfortunately,black screen again.

There are 4 items in the attach fils---the old dsdt.aml which works fine in OSX 10.7.0,the information list of IORegistryExplorer,the ROM file of GTX 260M Graphics Card and the acpi_dsdt.bin file(I get this from the system information software Everest).http://www.dell.com/...ware-m17x?s=dhsAnd the BIOS file of my laptop can be downloaded here.

So I am sorry that I have to ask a favour of anyone, with the hope that he/she will help me to fix the dsdt file to make it effective in mountain lion.